the story of a bright blue star

This is in continuation to the same motivation from a particularly peppy chat today afternoon with a particularly "Pretty" lady friend.
As it turns dark but before the moon and the stars wink in, there is a bright twinkle in the sky just like a diamond only infinitely prettier. It is the evening star shining bright to watch over you, Oh thy sleeping child!
And in the cold mornings, as the stars gradually wink out, the morning star winks again to let you know it'll be back.

There is no lore to this in many cultures, but they are the romanticists delight, the star-crossed lovers' sigh and the poet's sonnet. They are the one and the same - Ishtar more commonly known as Venus, named after the Goddess of love.